Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009dps....41.4405n&link_type=abstract
American Astronomical Society, DPS meeting #41, #44.05
Astronomy and Astrophysics
Astronomy
Scientific paper
Mars Phoenix landed in late May, 2008 on the northern plains of Mars (68.22° N , 234.25° E). The mission began in late Spring (Ls 77°) and ended in mid-Summer (Ls 148°), lasting for 151 sols. In situ measurements by the lander characterized the local atmospheric conditions (i.e. temperature, pressure, wind speeds and direction, opacity of dust and water ice, and the detection of surface water ice frost). Using the NASA Ames General Circulation Model (GCM) v2.1, we reproduce atmospheric conditions at the Mars Phoenix Lander site in an effort to explain the measured atmospheric phenomena (water ice clouds, ground frosts, etc.). As a result of our study, we have determined that the formation of ground fogs and frosts at the Phoenix landing site, and to some extent higher altitude clouds, is controlled by regional atmospheric circulation (weather) systems that alternately transport in moist air from the north (poleward direction) and dry air from the south (from Tharsis).
Feldman William
Murphy Jeremiah
Nelli Steven
Renno Nilton
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